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GB/T 819.2-2016 (GBT819.2-2016)

GB/T 819.2-2016_English: PDF (GBT 819.2-2016, GBT819.2-2016)
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GB/T 819.2-2016English90 Add to Cart 0--9 seconds. Auto-delivery Countersunk flat head screws with cross recess -- Part 2: Property class 8.8, stainless steel screws and non-ferrous metal screws Valid GB/T 819.2-2016

BASIC DATA
Standard ID GB/T 819.2-2016 (GB/T819.2-2016)
Description (Translated English) Countersunk flat head screws with cross recess -- Part 2: Property class 8.8, stainless steel screws and non-ferrous metal screws
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J13
Classification of International Standard 21.060.10
Word Count Estimation 11,160
Date of Issue 2016-02-24
Date of Implementation 2016-06-01
Older Standard (superseded by this standard) GB/T 819.2-1997
Quoted Standard GB/T 90.1; GB/T 90.2; GB/T 193; GB/T 944.1; GB/T 1237; GB/T 3098.1; GB/T 3098.6; GB/T 3098.10; GB/T 3103.1; GB/T 5267.1; GB/T 5267.2; GB/T 5267.4; GB/T 5276; GB/T 5279; GB/T 5279.2; GB/T 5279.1; GB/T 9145; GB/T 16938
Adopted Standard ISO 7046-2-2011, MOD
Drafting Organization Productivity Promotion Center in the machine
Administrative Organization National Fastener Standardization Technical Committee (SAC/TC 85)
Regulation (derived from) National Standard Announcement No
Proposing organization China Machinery Industry Federation
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies 8.8 type, stainless steel and non-ferrous metal cross-shaped countersunk head screw type size, technical conditions and markings. This standard applies to H and Z type cross recessed countersunk screws with thread grade M2 ??to M10, performance classes 8.8, A2-70, CU2, CU3, grade A of the product.

Standards related to: GB/T 819.2-2016

GB/T 819.2-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.060.10
J 13
Replacing GB/T 819.2-1997
Countersunk Flat Head Screws with Cross Recess –
Part 2. Property Class 8.8, Stainless Steel Screws and
Non-Ferrous Metal Screws
[ISO 7046-2.2011, Countersunk Flat Head Screws (Common Head Style) with
Type H or Type Z Cross Recess – Product Grade A – Part 2. Steel Screws of
Property Class 8.8, Stainless Steel Screws and Non-Ferrous Metal Screws,
MOD]
ISSUED ON. FEBRUARY 24, 2016
IMPLEMENTED ON. JUNE 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Dimension ... 7
4 Technical Conditions and Reference Standards ... 10
5 Markings ... 11
Foreword
This Part is one of the serial national standards of “Slotted Screws and Cross Recess
Screws”, such series include.
--- GB/T 65 Slotted Cheese Head Screws;
--- GB/T 67 Slotted Pan Head Screws;
--- GB/T 68 Slotted Countersunk Flat Head Screws;
--- GB/T 69 Slotted Raised Countersunk Head Screws;
--- GB/T 818 Pan Head Screws with Cross Recess;
--- GB/T 819.1 Countersunk Flat Head Screws with Cross Recess – Part 1. Property
Class 4.8;
--- GB/T 819.2 Countersunk Flat Head Screws with Cross Recess – Part 2. Property
Class 8.8, Stainless Steel Screws and Non-Ferrous Metal Screws;
--- GB/T 820 Raised Countersunk Head Screws with Cross Recess;
--- GB/T 822 Cross Recessed Cheese Head Screws;
--- GB/T 823 Cross Recessed Small Pan Head Screws;
--- GB/T 13806.1 Fasteners for Fine Mechanics - Cross Recessed Screws.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part replaced GB/T 819.2-1997 Countersunk Flat Head Screws with Cross
Recess – Part 2. Steel Property Class 8.8, Stainless Steel A2-70 and Non-Ferrous
Metal CU2 or CU3; compared with GB/T 819.2-1997, the major technical changes are
as follows.
--- Delete “if under special conditions, the technical conditions specified beyond this
Standard, ... GB 3106 and GB 9145” (Chapter 1 of 1997 Edition);
--- Unify the reference thread standards into GB/T 193, GB/T 9145 (see Chapter 2);
--- add “d< 3mm, as per agreement” to the property class of steel and non-ferrous
metal screws (see Table 2);
--- Add the steel screws non--electrolytically applied zinc flake coating technical
requirements as per GB/T 5267.2 (see Table 2);
--- Add the stainless-steel screws passivation treatment technical requirements as
Countersunk Flat Head Screws with Cross Recess –
Part 2. Property Class 8.8, Stainless Steel Screws and
Non-Ferrous Metal Screws
1 Scope
This Part of GB/T 819 specifies the type and dimension, technical conditions and
markings of stainless steel and non-ferrous metal countersunk flat head screws with
cross recess and property class 8.8.
This Part is applicable to Type-H and Type-Z countersunk flat head screws with cross
recess for Thread Specification M2~M10, Property Class 8.8, A2-70, CU2, CU3,
Product Grade A.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 90.1 Fasteners – Acceptance Inspection (GB/T 90.1-2002, ISO 3269.2000,
IDT)
GB/T 90.2 Fasteners – Marking and Packaging
GB/T 193 General Purpose Screw Threads – Diameters and Pitches (GB/T 193-
2003, ISO 261.1998, MOD)
GB/T 944.1 Cross Recesses for Screws (GB/T 944.1-1985, eqv ISO 4757.1983)
GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO
8991.1986)
GB/T 3098.1 Mechanical Properties of Fasteners - Bolts, Screws and Studs (GB/T
3098.1-2010, ISO 898-1.2009, MOD)
GB/T 3098.6 Mechanical Properties of Fasteners – Stainless Steel Bolts, Screws
and Studs (GB/T 3098.6-2014, ISO 3506-1.2009, MOD)
GB/T 3098.10 Mechanical Properties of Fasteners –Bolts, Screws and Studs
Made of Non-Ferrous Metals (GB/T 3908.10-1993, eqv ISO 8839.1986)
GB/T 3103.1 Tolerances for Fasteners – Bolts, Screws and Nuts (GB/T 3103.1-
2002, idt ISO 4759-1.2000)
GB/T 5267.1 Fasteners – Electroplated Coatings (GB/T 5267.1-2002, ISO
4042.1999, IDT)
GB/T 5267.2 Fasteners – Non-Electrolytically Applied Zinc Flake Coatings (GB/T
5267.2-2002, ISO 10683.2000, IDT)
GB/T 5267.4 Passivation of Corrosion – Resistant Stainless – Steel Fasteners
(GB/T 5267.4-2009, ISO 16048.2003, IDT)
GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Descriptions
of Dimensions (GB/T 5276-2015, ISO 225.2010, MOD)
GB/T 5279 Countersunk Head Screws - Head Configuration and Gauging (GB/T
5279-1985, idt ISO 7721.1983)
GB/T 5279.2 Countersunk Flat Head Screws - Part 2. Penetration Depth of Cross
Recesses (GB/T 5279.2-1997, idt ISO 7721-2.1990)
GB/T 5779.1 Fastener – Surface Discontinues – Bolts, Screws and Studs for
General Requirements (GB/T 5779.1-2000, idt ISO 6157-1.1988)
GB/T 9145 General Purpose Metric Screw Threads - Limits of Sizes for the Screw
Threads of Medium Quality and Preferable Plan (GB/T 9145-2003, ISO 965-
2.1998, MOD)
GB/T 16938 Fasteners – General Requirements for Bolts, Screws, Studs and Nuts
(GB/T 16938-2008, ISO 8992.2005, IDT)
3 Dimension
The type and dimension of screws can refer to Figure 1 and Table 1.
The dimension codes and markings shall conform to GB/T 5276.
The shank diameter of the part without thread equals to the medium diameter of thread
or allows equaling to the large diameter of thread.
Screw GB/T 819.2 M5×20
If insert depth series are needed to designate, the type and series number of cross
recess shall be indicated in the marking, e.g.. Type-H, Series 1.
Screw GB/T 819.2 M5×20 H1
...